Question: Who was the head of government of Poznań in 2014?
Paraphrase: Give me the name of the person who headed government of Poznań in 2014?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q268 p:P6 ?s . ?s ps:P6 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'2014')) }